Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Lease		$ 666,674	$ 692,225	$ 2,006,904	$ 2,051,665
Total revenue		693,268	743,553	2,100,597	2,203,061
Expenses
Rental		258,261	265,603	761,014	781,091
General and administrative		27,862	31,147	102,059	107,980
Transaction costs		307	538	1,254	1,415
Depreciation and amortization		166,456	165,862	515,738	507,867
Total expenses		458,946	474,322	1,400,640	1,432,266
Other income (expense)
Income (Loss) from Unconsolidated Joint Ventures		(6,873)	(649)	(5,410)	47,528
Gains (losses) on sales of real estate		(209)	(15)	613,723	766
Interest and other income		(45)	7,178	4,277	14,546
Gains from investments in securities		1,858	106	965	4,240
Impairment losses		0	0	0	(24,038)
Loss from early extinguishment of debt		0	(28,010)	0	(28,010)
Interest expense		(110,993)	(106,471)	(319,726)	(309,837)
Net income		118,060	141,370	993,786	475,990
Net (income) loss attributable to noncontrolling interests
Noncontrolling interests in property partnerships		(15,561)	(18,470)	(34,280)	(54,782)
Noncontrolling interest - common units of the Operating Partnership		(10,020)	(12,504)	(97,090)	(43,133)
Net income attributable to the Company		92,479	110,396	862,416	378,075
Preferred dividends / distributions		(2,625)	(2,625)	(7,875)	(7,875)
Net income attributable to the Company's common shareholders / unitholders		$ 89,854	$ 107,771	$ 854,541	$ 370,200
Basic earnings per common share / unit attributable to the Company
Earnings Per Share After Allccation of Undistributed Earnings to Particiapting Securities Basic (dollars per share)		$ 0.58		$ 5.49
Net income (in dollars per share / unit)		$ 0.58	$ 0.70	$ 5.50	$ 2.40
Weighted average number of common shares / units outstanding (in shares / units)		155,645	154,577	155,349	154,553
Diluted earnings per common share / unit attributable to the Company
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit)		$ 0.58	$ 0.70	$ 5.49	$ 2.39
Weighted average number of common and common equivalent shares / units outstanding (in shares / units)		155,670	154,820	155,447	154,847
Boston Properties Limited Partnership
Revenue
Lease		$ 666,674	$ 692,225	$ 2,006,904	$ 2,051,665
Total revenue		693,268	743,553	2,100,597	2,203,061
Expenses
Rental		258,261	265,603	761,014	781,091
General and administrative		27,862	31,147	102,059	107,980
Transaction costs		307	538	1,254	1,415
Depreciation and amortization		164,706	164,020	510,400	501,901
Total expenses		457,196	472,480	1,395,302	1,426,300
Other income (expense)
Income (Loss) from Unconsolidated Joint Ventures		(6,873)	(649)	(5,410)	47,528
Gains (losses) on sales of real estate		(209)	(15)	626,686	915
Interest and other income		(45)	7,178	4,277	14,546
Gains from investments in securities		1,858	106	965	4,240
Impairment losses		0	0	0	(22,272)
Loss from early extinguishment of debt		0	(28,010)	0	(28,010)
Interest expense		(110,993)	(106,471)	(319,726)	(309,837)
Net income		119,810	143,212	1,012,087	483,871
Net (income) loss attributable to noncontrolling interests
Noncontrolling interests in property partnerships		(15,561)	(18,470)	(34,280)	(54,782)
Net income attributable to the Company		104,249	124,742	977,807	429,089
Preferred dividends / distributions		(2,625)	(2,625)	(7,875)	(7,875)
Net income attributable to the Company's common shareholders / unitholders		$ 101,624	$ 122,117	$ 969,932	$ 421,214
Basic earnings per common share / unit attributable to the Company
Earnings Per Share After Allccation of Undistributed Earnings to Particiapting Securities Basic (dollars per share)				$ 5.61
Net income (in dollars per share / unit)		$ 0.59	$ 0.71	$ 5.62	$ 2.45
Weighted average number of common shares / units outstanding (in shares / units)		172,677	172,215	172,628	172,183
Diluted earnings per common share / unit attributable to the Company
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit)		$ 0.59	$ 0.71	$ 5.61	$ 2.44
Weighted average number of common and common equivalent shares / units outstanding (in shares / units)		172,702	172,458	172,726	172,477
Parking and Other [Member]
Revenue
Other revenue		$ 16,327	$ 25,582	$ 54,777	$ 76,807
Parking and Other [Member] | Boston Properties Limited Partnership
Revenue
Other revenue		16,327	25,582	54,777	76,807
Hotel [Member]
Revenue
Other revenue	[1]	90	13,014	7,014	36,796
Expenses
Operating expense		3,164	8,743	11,958	25,686
Hotel [Member] | Boston Properties Limited Partnership
Revenue
Other revenue		90	13,014	7,014	36,796
Expenses
Operating expense		3,164	8,743	11,958	25,686
Real Estate, Other [Member]
Revenue
Other revenue		2,896	2,429	8,617	8,227
Expenses
Operating expense		2,896	2,429	8,617	8,227
Real Estate, Other [Member] | Boston Properties Limited Partnership
Revenue
Other revenue		2,896	2,429	8,617	8,227
Management Service [Member]
Revenue
Other revenue		7,281	10,303	23,285	29,566
Management Service [Member] | Boston Properties Limited Partnership
Revenue
Other revenue		7,281	10,303	23,285	29,566
Expenses
Operating expense		$ 2,896	$ 2,429	$ 8,617	$ 8,227

[1] Rental Revenue is equal to Total Revenue per the Company’s Consolidated Statements of Operations, less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Contracts Revenue per the Consolidated Statements of Operations.